An implementation of a very simple block allocator. More...
#include "simpleAllocator.h"
Public Member Functions | |
| SimpleAllocator (size_t max_size, Mutex &lock) | |
| SimpleAllocator (SimpleAllocator &&from) noexcept | |
| Move constructor. More... | |
| SimpleAllocatorBlock * | alloc (size_t size, size_t alignment=1) |
| Allocates a new block. More... | |
| size_t | get_contiguous () const |
| Returns an upper-bound estimate of the size of the largest contiguous block that may be allocated. More... | |
| SimpleAllocatorBlock * | get_first_block () const |
| Returns a pointer to the first allocated block, or NULL if there are no allocated blocks. More... | |
| size_t | get_max_size () const |
| Returns the available space for allocated objects. More... | |
| size_t | get_total_size () const |
| Returns the total size of allocated objects. More... | |
| bool | is_empty () const |
| Returns true if there are no blocks allocated on this page, or false if there is at least one. More... | |
| void | output (std::ostream &out) const |
| void | set_max_size (size_t max_size) |
| Changes the available space for allocated objects. More... | |
| void | write (std::ostream &out) const |
Friends | |
| class | SimpleAllocatorBlock |
Detailed Description
An implementation of a very simple block allocator.
This class can allocate ranges of nonnegative integers within a specified upper limit; it uses a simple first-fit algorithm to find the next available space.
Definition at line 29 of file simpleAllocator.h.
Constructor & Destructor Documentation
◆ SimpleAllocator()
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noexcept |
Move constructor.
Definition at line 20 of file simpleAllocator.cxx.
Member Function Documentation
◆ alloc()
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inline |
Allocates a new block.
Returns NULL if a block of the requested size cannot be allocated.
To free the allocated block, call block->free(), or simply delete the block pointer.
Definition at line 35 of file simpleAllocator.I.
◆ get_contiguous()
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inline |
Returns an upper-bound estimate of the size of the largest contiguous block that may be allocated.
It is guaranteed that an attempt to allocate a block larger than this will fail, though it is not guaranteed that an attempt to allocate a block this size or smaller will succeed.
Definition at line 86 of file simpleAllocator.I.
◆ get_first_block()
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inline |
Returns a pointer to the first allocated block, or NULL if there are no allocated blocks.
Definition at line 96 of file simpleAllocator.I.
Referenced by VertexDataPage::get_first_block().
◆ get_max_size()
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inline |
Returns the available space for allocated objects.
Definition at line 63 of file simpleAllocator.I.
◆ get_total_size()
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inline |
Returns the total size of allocated objects.
Definition at line 54 of file simpleAllocator.I.
Referenced by VertexDataSaveFile::get_used_file_size().
◆ is_empty()
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inline |
Returns true if there are no blocks allocated on this page, or false if there is at least one.
Definition at line 45 of file simpleAllocator.I.
◆ set_max_size()
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inline |
Changes the available space for allocated objects.
This will not affect any already-allocated objects, but will have an effect on future calls to alloc().
Definition at line 74 of file simpleAllocator.I.
The documentation for this class was generated from the following files:
- panda/src/gobj/simpleAllocator.h
- panda/src/gobj/simpleAllocator.cxx
- panda/src/gobj/simpleAllocator.I
